The Meteosat Second Generation (MSG) satellites are geostationary weather satellites developed by a joint venture of ESA ( European Space Agency) and EUMETSAT ( European Organisation for the exploitation of Meteorological satellites). Meteosat-8 is operational since mid-2004, transmitting new observations every 15 minutes in 12 spectral channels. The previous series of weather satellites 'only' transmitted observations every 30 minutes in 3 spectral channels (visible, infrared and water vapour)

Knowledge of meteorology and climate has evolved tremendously thanks to the availability of detailed satellite images. That is why satellite observations are an essential input for weather models and they are very important for weather predictions in the short and medium term.

It is also possible to observe cloud patterns through satellite images and to continuously follow up their evolution.

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